John Horn, Volkert Construction Services In August 2005, Hurricane Katrina decimated the Gulf Coast and nearly destroyed the 5.5-mile (8.9-km) long twin-span, I-10 bridges that connect South Mississippi with New Orleans across Lake Pontchartrain. The existing structures were quickly repaired
Letter to the Editor
The following letter was received concerning the article titled “Measurement of Air Content in Concrete,” which was published in HPC Bridge Views, Issue No. 61, May/June 2010. EditorThe article describes various methods for measuring the air content of concrete. I think
AASHTO Adopts Recommended Practice on Alkali-Silica Reactivity
Gina Ahlstrom, Federal Highway Administration In August 2008, a task group was formed under the American Association of State Highway and Transportation Officials (AASHTO) Subcommittee on Materials to review current specifications pertaining to alkali-silica reactivity (ASR). The task group was
Read More >>AASHTO Adopts Recommended Practice on Alkali-Silica Reactivity
HPC for the Angeles Crest Bridge 1
Jose Higareda, California Department of Transportation The Angeles Crest Bridge 1 is located along scenic Route 2 northwest of the city of Los Angeles within the Angeles National Forest, California. The 208-ft (63.4-m) long single span, precast, prestressed concrete, spliced
Question & Answer
Question: If the concrete in my precast, prestressed concrete bridge beams has achieved the specified compressive strength before the specified age, is there any reason not to transport and erect them? Answer: For prestressed concrete bridge beams, the Engineer specifies